RECENT RESULTS ON GAMMA SPECTROMETRIC MEASUREMENTS AT LNGS Matthias Laubenstein I.N.F.N. - L.N.G.S.

GERDA Meeting @ Tübingen, TG 11 Recent developments two new Germanium detectors, similar to GeMPI detector (in fact they are called GeMPI-2 and GeMPI-3, GeMPI-2 still under test; GeMPI-3 arrived on October 25th, shielding still to be built) new space available in hall A … but it is already almost filled up … November, 9th-11th 2005 GERDA Meeting @ Tübingen, TG 11

GERDA Meeting @ Tübingen, TG 11 Material screening (old data) (expanded uncertainties and decision thresholds with k=2) November, 9th-11th 2005 GERDA Meeting @ Tübingen, TG 11

GERDA Meeting @ Tübingen, TG 11 Material screening (with new data) (expanded uncertainties and decision thresholds with k=2) November, 9th-11th 2005 GERDA Meeting @ Tübingen, TG 11

Forthcoming results and analyses Lexan electronic components (in measurement also for other experiments, but up to know nothing “clean”, O(hundreths of Bq/kg) Kapton coax cable (only 30 g, now ca. 12 days) November, 9th-11th 2005 GERDA Meeting @ Tübingen, TG 11

Still the same question marks Time schedule for measurements ? List of materials to be measured ? Required sensitivities ? Intercomparison between radioactivity analysis laboratories ? Intercomparison between screening techniques ? November, 9th-11th 2005 GERDA Meeting @ Tübingen, TG 11